Segmented prism element and associated methods for manifold fiberoptic switches

• US 7,720,329 B2
• Filed: 06/12/2007
• Issued: 05/18/2010
• Est. Priority Date: 11/07/2006
• Status: Active Grant

• Current Assignee: Lumentum Operations, LLC (Lumentum Holdings Inc.)
• Original Assignee: Olympus Corporation
• Inventors: Presley, Harry Wayne, Nagy, Michael
• Primary Examiner(s): PENG, CHARLIE YU
• Application Number:
  US11/811,928
• Publication Number:
  US 20090028502A1
• Time in Patent Office: 1,071 Days
• Field of Search: 385/16, 385/18, 385/22, 385/24, 385/47, 385/48, 359/872, 359/877
• US Class Current: 385/18
• CPC Class Codes: G02B 6/29385 Channel monitoring, e.g. by tapping channel monitoring in optical transmission systems H04B10/07
• CPC Class Codes: G02B 6/34 utilising prism or grating G02B6/293 takes precedence
• CPC Class Codes: G02B 6/352 the reflective optical element having a shaped reflective surface, e.g. a reflective element comprising several reflective surfaces or facets that function together
• CPC Class Codes: G02B 6/3548 1xN switch, i.e. one input and a selectable single output of N possible outputs
• CPC Class Codes: G02B 6/356 in an optical cross-connect device, e.g. routing and switching aspects of interconnecting different paths propagating different wavelengths to (re)configure the various input and output links switching polarized beams G02B6/3594; power equalizers G02B6/356 and G02B6/3594; path selecting means H04Q11/0001
• CPC Class Codes: G02B 6/3588 of the processed beams, i.e. controlling during switching of orientation, alignment, or beam propagation properties such as intensity, size or shape

Abstract

A fiber optic switch utilizing a segmented prism element, comprising a fiber optic switch used in multi-channel optical communications networks and having one or more arrays of micro electromechanical system (MEMS) mirrors, wherein at least a first array of MEMS mirrors is utilized to select & switch wavelengths from a number of input fiber ports (N) to an output fiber port, wherein at least a second array of MEMS mirrors using and sharing the same free space optics as the first MEMS array is utilized to produce yet another fiber optic switch, wherein the second switch is utilized to select individual wavelengths or spectral components from its input fiber ports to send to its output fiber port for optical power or other monitoring purposes, thus, enabling a cost effective, high level of integration N×1 or alternatively a 1×N switch capable of internal feedback monitoring.

Claims

1. An optical system, comprising:

at least one first moveable mirror for receiving and reflecting at least one first selected wavelength from one or more input fiber ports to one output fiber port according to a position of said first mirror, said output fiber port transmitting an output optical signal of selected wavelengths from one or more input optical signals from said one or more input fiber ports;

a tap for coupling a portion of said output fiber port output optical signal to a first monitoring port;

at least one second moveable mirror for receiving and selectively reflecting at least one second selected wavelength from said first monitoring port to an output monitoring port according to a position of said second mirror;

at least one steering element for steering the first selected wavelength from each of said one or more input fiber ports onto said first mirror, and steering the first selected wavelength from said first mirror to said output fiber port, and further steering the second selected wavelength from said first monitoring port onto said second mirror, and steering the second selected wavelength from said second mirror to said output monitoring port; and

an optical measurement device for receiving the second selected wavelength of a portion of the output optical signal coupled to said output monitoring port and measuring at least one optical property of the output optical signal.

2. The system of claim 1, wherein a measurement by said optical measurement device is output from said system.

3. The system of claim 1, further comprising a controller receiving an output of said optical measurement device and responsively adjusting said position of said first mirror to effect control of said measured property of said at least one first selected wavelength of said output optical signal.

4. The system of claim 3, comprising a plurality of said first mirrors, a plurality of input optical signals from a plurality of said input fiber ports, and said optical measurement device sequentially receiving a plurality of the second selected wavelength of the portion of the output optical signal and sequentially measuring at least one optical property of said plurality of the second selected wavelength, and wherein said controller adjusts said position of a plurality of said first mirror to effect control of said plurality of the first selected wavelength of the output optical signal.

5. The system of claim 1, further comprising a wavelength dispersive element for spatially separating each of the input optical signals into a plurality of spatially separated wavelengths.

6. The system of claim 1, wherein said at least one first and at least one second moveable mirrors are tiltable mirrors.

7. The system of claim 6, wherein said tiltable mirrors are included in a micro electromechanical system array.

8. The system of claim 3, wherein said controller controls a switching route between said input fiber ports and said output fiber port by tilting said at least one first mirror.

9. The system of claim 3, wherein said controller adjusts at least some of the power transmission coefficients of the first selected wavelength of said output fiber port optical signal to be less than their maximum values.

10. The system of claim 1, further comprising at least one auxiliary monitoring port, wherein said at least one second moveable mirror selectively couples one wavelength of said portion of said output fiber port output optical signal, or one wavelength of said at least one auxiliary monitoring port to said output monitoring port according to a position of said second mirror.

11. The system of claim 6, wherein said optical measurement device measures said at least one optical property of each wavelength component of each said output optical signal, and therefrom controls a tilting of said at least one first mirror to effect a fractional change in power transmission through said system.

12. The system of claim 1, further comprising a fiber port concentrator coupled to said one or more input port, said one output fiber port, said first monitoring port, and said output monitoring port, wherein said fiber port concentrator optimizes the port-to-port spacing and outputs or receives the optical signals from free space in a predominately linearly spaced grid.

13. The system of claim 12, wherein said tap is positioned within said fiber port concentrator.

14. The system of claim 1, further comprising optics wherein said optics focus the optical signals of said one or more input ports and said one output fiber port.

15. The system of claim 1, further comprising front end optics, wherein the optical signals of said one or more input ports and said one output fiber port are focused and collimated thereby.

16. The system of claim 1, further comprising back end optics, said back end optics steering and focusing the wavelength from said input ports onto said mirror, and steering the selected wavelength from said mirror to said one output fiber port.

17. The system of claim 1, further comprising a second monitoring port.

18. The system of claim 17, wherein said at least one second moveable mirror for receiving and selectively reflecting the second selected wavelength from said first or said second monitoring port to said output monitoring port according to a position of said second mirror.

19. The system of claim 18, wherein a measurement by said optical measurement device is output from said system.

20. The system of claim 1, wherein said steering element further comprises a monolithic element containing multiple prisms.

21. The system of claim 1, wherein said steering element further comprises a monolithic element containing multiple lenses.

22. The system of claim 7, further comprising one or more optical systems corresponding to the system of claim 7, wherein said systems are housed in a single manifold housing, and share said micro electromechanical system array and said steering element.